OnTheYouthful: I really appreciate the way you read this. :)
And I'd say the gap most certainly changes as the ages increase, for a few reasons.
For one, mathematically, we're looking at massively different differentials when it comes to the amount of time/percentage of life someone has lived when, for instance, we have a partnership where someone is 15 and someone 25, and one where someone is 35 and someone is 45.
But there's also a BIG difference when both partners have the same legal rights: when both are legal adults, rather than when one is still a legal minor.
Editor & Founder, Scarleteen: Sex Ed for the Real World
Author, S.E.X.: The All-You-Need-to-Know Progressive Sexuality Guide to Get You Through High School and Col